Mounting assembly for a smoke alarm

Abstract

A smoke detector or alarm includes on its lower side a cylindrical cup which may be lined with ribbed foam rubber. The inside diameter formed by the liner is designed to mate with the end of a broom or mop handle so that the cup forms a reasonably firm fitting socket for the handle end. A wedge shape triangular adapter plate is mounted on top of the smoke detector and slightly spaced from the top by a round vertical stud. Secured either directly to the ceiling or to the usual smoke detector mounting fasteners is a receiver into which the adapter plate fits. The receiver is in the form of a horizontal wedge shape triangular slot, the bottom of which has a blind slot to accommodate the stud of the adaptor. The bottom of the entrance to the receiver is provided with a lip over which the adapter plate must move. The smoke alarm may accordingly be readily removed and replaced for battery changing, servicing, and testing without the use of a step ladder or step stool. The adapter, receiver and cup form the major components of a kit which may be applied to new or existing smoke detectors.

What we claim is: 
     
       1. A smoke detector comprising a main housing containing the battery and alarm, said housing having a bottom surface, a cup secured to said bottom surface and opening downwardly, an adapter mounted on top of said housing and including a horizontal plate, and a receiver adapted to be mounted on a ceiling, said receiver including a slot adapted to receive said plate, whereby a handle may be inserted in said cup, and used to remove said plate from said slot so that the smoke detector may conveniently be removed from the ceiling for battery replacement or servicing. 
     
     
       2. A smoke detector as set forth in claim 1 wherein said adapter and receiver mate to support said detector against horizontal movement. 
     
     
       3. A smoke detector as set forth in claim 2 wherein said adapter includes an elevated triangular plate, and said receiver includes a triangular pocket, the joining walls of the pocket being at the same angle as two of the edges of said plate. 
     
     
       4. A smoke detector as set forth in claim 3 including a lip along the lower edge of the opening of the pocket, said plate nesting within the lip. 
     
     
       5. A smoke detector as set forth in claim 3 including a stud supporting said plate above said housing, and a blind slot in the receiver to accommodate and capture said stud. 
     
     
       6. A smoke detector as set forth in claim 5 including a mounting plate for said adapter for mounting said adapter on said housing, said mounting plate having spaced fastening holes and spaced fastening holes in said receiver of the same spacing. 
     
     
       7. A smoke detector as set forth in claim 1 including a lining in said cup to obtain a releasable friction grip with such handle. 
     
     
       8. A kit for mounting a smoke detector to a ceiling, a cup having a bottom opening adapted to be secured to the bottom of the smoke detector, an adaptor having a horizontal plate adapted to be secured to the top of the smoke detector, and a receiver adapted to be secured to a ceiling and having a horizontal slot adapted to receive said adaptor horizontal plate when the smoke detector is manipulated by a handle inserted in the bottom opening of the cup. 
     
     
       9. A kit as set forth in claim 8 wherein said adapter and receiver mate to support said detector against horizontal movement. 
     
     
       10. A kit as set forth in claim 9 wherein said adapter includes an elevated triangular plate, and said receiver includes a triangular pocket, the joining walls of the pocket being at the same angle as two of the edges of said plate. 
     
     
       11. A kit as set forth in claim 10 including a lip along the lower edge of the opening of the pocket, said plate nesting within the lip. 
     
     
       12. A kit as set forth in claim 10 including a stud supporting said plate above said housing, and a blind slot in the receiver to accommodate and capture said stud. 
     
     
       13. A kit as set forth in claim 12 including a mounting plate for said adapter for mounting said adapter on said housing, said mounting plate having spaced fastening holes and spaced fastening holes in said receiver of the same spacing. 
     
     
       14. A kit as set forth in claim 8 including a lining in said cup to obtain a releasable friction grip with such handle. 
     
     
       15. A kit as set forth in claim 14 wherein said lining is foam rubber with annular inwardly projecting ridges.